Multiple drain trap primer valve assembly for sewer lines

Abstract

A multiple drain trap primer valve assembly. The assembly comprises a plumbing conduit system including a house line 10 carrying water under pressure and a plurality of branch lines 12 each serving the drain trap 14 of a particular plumbing fixture. A manifold 26 having multiple discharge openings is connected into the house line. Coupling means 30 couple the branch lines to the manifold, one to each opening. Each coupling means includes a flow orifice 44 of size predetermined to equalize the flow of priming water to the branch line. Time-clock controlled valve means 20 is positioned in the house line to open it to the flow of water at predetermined time intervals.

I claim: 
     
       1. A multiple drain trap primer valve assembly comprising in combination: a) a plumbing conduit system including a house line 10 carrying water under pressure and a plurality of branch lines 12 each serving the drain trap 14 of a particular plumbing fixture,   b) connected into the house line, manifold means 26 for receiving water under pressure from the house line and having a plurality of discharge openings 28, one for each branch line,   c) a plurality of coupling means 30 for coupling the branch lines to the manifold openings, one to each opening,   d) the coupling means each including a flow orifice 44 of size predetermined to substantially equalize the flow of priming water to each branch line 12, and   e) in the house line, upstream from the manifold means, valve means 20 positioned for opening the house line to the manifold means to deliver water under pressure through the flow orifices to the branch lines for a predetermined timed period at predetermined timed intervals.   
     
     
       2. The multiple drain trap primer valve assembly of claim 1 wherein the valve means comprise time-clock-controlled valve means for controlling delivery of water pressure to the manifold means and branch lines for a predetermined timed period at predetermined timed intervals. 
     
     
       3. The multiple drain trap primer valve assembly of claim 1 wherein the valve means comprise electronically operated time clock control valve means for controlling delivery of water under pressure to the manifold means and branch lines for a predetermined timed period at predetermined timed intervals. 
     
     
       4. The multiple drain trap primer valve assembly of claim 1 wherein the valve means 20 comprises electrically operated, time clock-controlled valve means in a first electric circuit including an electric time clock 46-operated cam 50 and a second electric circuit including in series with electric switch means 52 positioned for operation by said cam, electric solenoid means 56 positioned for operation of the valve means for controlling delivery of water under pressure to the manifold means and branch lines for a predetermined timed period at predetermined timed intervals. 
     
     
       5. The multiple drain trap primer valve assembly of claim 4 wherein the electric switch means 52 comprises time delay electric switch means for controlling delivery of water under pressure to the manifold means and branch lines for a predetermined timed period. 
     
     
       6. The multiple drain trap primer valve assembly of claim 4 including a case 60 receiving the assembly components and dimensioned for reception between and fastening to the studs of a structural wall.